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PREPAID EXPENSES AND OTHER CURRENT ASSETS (Schedule of Other Receivables and Prepaid Expenses) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Prepaid Expense and Other Assets [Abstract]    
Government authorities $ 81,012 $ 46,444
Interest receivable 5,829 6,948
Prepaid expenses 81,459 56,008
Other 7,040 7,572
Prepaid expenses and other current assets $ 175,340 $ 116,972